The right subclavian artery receives blood from the brachiocephalic trunk (which is the first branch to arise from the aortic arch). The Left Subclavian Artery Branches off directly from the arch ...

the circumflex coronary branch continues at the dorsoposterior side. The right coronary artery (RCA) arises further caudal, at the right aortic sinus. The RCA runs through the atrioventricular ...